From 292b4d0978e3bbb087a83ce77e389c7b462a093c Mon Sep 17 00:00:00 2001 From: Harvey Harrison Date: Tue, 6 Jan 2009 14:56:22 -0800 Subject: avr32: introduce asm/swab.h Signed-off-by: Harvey Harrison Signed-off-by: Linus Torvalds --- arch/avr32/include/asm/swab.h | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 arch/avr32/include/asm/swab.h (limited to 'arch/avr32/include/asm/swab.h') diff --git a/arch/avr32/include/asm/swab.h b/arch/avr32/include/asm/swab.h new file mode 100644 index 00000000000..a14aa5b46d9 --- /dev/null +++ b/arch/avr32/include/asm/swab.h @@ -0,0 +1,35 @@ +/* + * AVR32 byteswapping functions. + */ +#ifndef __ASM_AVR32_SWAB_H +#define __ASM_AVR32_SWAB_H + +#include +#include + +#define __SWAB_64_THRU_32__ + +#ifdef __CHECKER__ +extern unsigned long __builtin_bswap_32(unsigned long x); +extern unsigned short __builtin_bswap_16(unsigned short x); +#endif + +/* + * avr32-linux-gcc versions earlier than 4.2 improperly sign-extends + * the result. + */ +#if !(__GNUC__ == 4 && __GNUC_MINOR__ < 2) +static inline __attribute_const__ __u16 __arch_swab16(__u16 val) +{ + return __builtin_bswap_16(val); +} +#define __arch_swab16 __arch_swab16 + +static inline __attribute_const__ __u32 __arch_swab32(__u32 val) +{ + return __builtin_bswap_32(val); +} +#define __arch_swab32 __arch_swab32 +#endif + +#endif /* __ASM_AVR32_SWAB_H */ -- cgit v1.2.3